Ruby/Hash/delete

myHash = { 1 => "One", 2 => "Two", 3 => "Three", 4 => "Four", 5 => "Five" }
myHash.delete( 5 ) # => "Five"
p myHash # => {1=>"One", 2=>"Two", 3=>"Three", 4=>"Four"}

# You can delete key-value pairs from a hash with the delete method. 
myHash = { 1 => "One", 2 => "Two", 3 => "Three", 4 =>"Four", 5 => "Five" }
# I"ll delete the pair identified by key 5:
myHash.delete( 5 ) # => "Five"

x = { "a" => 1, "b" => 2 }
x.delete("a")
puts x.inspect

If the key you"re wanting to delete is not found, the block runs, and its return value will be returned by delete.
myHash = { 1 => "One", 2 => "Two", 3 => "Three", 4 => "Four", 5 => "Five" }
myHash.delete( 6 ) { |key| puts "not found, bubba" }